半固态粉末成形温度对Mg-6Zn-<em>x</em>Mn显微组织和力学性能的影响

doi:10.19976/j.cnki.43-1448/TF.2022050

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Abstract Using metal magnesium, zinc, manganese powders as raw materials, Mg-6Zn-xMn (x=0.5%, 1.0%) magnesium alloys were prepared at a temperature of 540-600 ℃ by semi-solid powder moulding method. The effects of forming temperature on the microstructures (phase and grain size), mechanical properties (compressive strength and microhardness), and corrosion resistance of the alloys were investigated by means of optical microscope, X-ray diffractometer, scanning electron microscope, microhardness tester, universal testing machine, and electrochemical test. The results show that with the increase of forming temperature, the relative density and average grain size increase, while the microhardness and compressive strength decrease. With the forming temperature increasing from 540 ℃ to 600 ℃, the compressive strength of Mg-6Zn-0.5Mn and Mg-6Zn-1.0Mn alloys decreases from 382.8 MPa and 372.1 MPa to 348.9 MPa and 353.1 MPa (decreasing by about 8.9% and 5.4%, respectively), mainly as the forming temperature increases, more oxide inclusions are generated at the grain boundaries, thereby reducing the compressive strength of the alloy. The microhardness (HV) of the alloys is above 95.1, and Mg-6Zn-0.5/1.0Mn alloy prepared at 600 ℃ has the lowest degradation rate of 0.263 mm/a and 0.183 mm/a, respectively.

Key words： semi-solid powder moulding medical magnesium alloy mechanical properties compressive strength degradation property

Received: 12 April 2022 Published: 14 September 2022

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TG146.2

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	Articles by authors
	YANG Shanghui
	LUO Xia
	LI Mingyu
	LIU Jiaxing
	LÜ Chunyang
	HUANG Jing
	BAO Feifei
	HUANG Bensheng

Cite this article:

YANG Shanghui,LUO Xia,LI Mingyu, et al. Effects of temperature on microstructure and mechanical properties of Mg-6Zn-xMn alloy prepared by semi-solid powder moulding[J]. Materials Science and Engineering of Powder Metallurgy, 2022, 27(4): 372-381.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2022050 OR http://pmbjb.csu.edu.cn/EN/Y2022/V27/I4/372

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